/Engine/Source/Runtime/Engine/Public/DebugRenderSceneProxy.h
Draws a line with an arrow at the end.
void DrawLineArrow ( [FPrimitiveDrawInterface](API\Runtime\Engine\FPrimitiveDrawInterface) * PDI, const FVector & Start, const FVector & End, const [FColor](API\Runtime\Core\Math\FColor) & Color, float Mag ) const